| 摘要 |
PURPOSE:To listen to one sentence in repeting practices for many times, by counting the running amount of a tape as a pulse number with the pulse generator and inputting said pulse to the addition input side of a table counter at playing and to the subtraction input side at rewinding. CONSTITUTION:The device is provided with a pulse generator 14 which can measure the running amount of a tape 1 recorded of an information as a pulse number with the rsolution of at least several fractions or lower of the information of one section, a tape counter 34 which connects the generator 14, to the addition input side at playing and to the subtraction input side at rewinding and which is reset at the start of the information of one section and which outputs the borrow signal when the substracted value reaches zero or negative, a sound signal detection circuit 24 which detects the presence or absence of the information recorded on the tape 1, a delay circuit which has delay characteristics to compensate the pause of short period in the detection signal of the circuit 24, and a timer counter 47 which computes an output time of the information of one section and outputs the time in proportion to the information time of one section in case of the repetitive mode. |
